Question: The function validName ( ) is supposed to return True if its string parameter v is a valid name for a Python variable, and False

The function validName() is supposed to return True if its string parameter v is a valid
name for a Python variable, and False otherwise. However, it contains an error; in partic-
ular, the test case pika4ever gives False, when it should give True. Which single-line
substitution below is enough to fix the code so that it works as intended?

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